Summoner Name Question

So I've had a nickname for years and I want to make it my summoner name. However, it was given to me by a Croatian friend and as such it has an accented letter in it, which i have learned is not possible to add in NA. I was wondering, if I account transfer to EUW and change my name, will it keep the accent when I transfer back? I don't want to spend the RP until I know for sure
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